在SQL中以YYYY-MM-DD HH：MM：SS格式转换日期和时间字符串

Question

Is there any way to convert "A date and time string in the format YYYY-MM-DD HH:MM:SS” using legacy SQL syntax or standard SQL syntax in BigQuery.

For eg. "November 9, 2017" to 2017-11-09 00:00:00

Answer 1

Below is for BigQuery Standard SQL

#standardSQL
SELECT PARSE_DATE('%B %d, %Y', 'November 9, 2017')

result is

f0_  
2017-11-09   

or you can use

#standardSQL
SELECT PARSE_DATETIME('%B %d, %Y', 'November 9, 2017') 

which returns

f0_  
2017-11-09T00:00:00  

Answer 2

SQL Server (2005, 2000, 7.0) does not have any flexible, or even non-flexible, way of taking an arbitrarily structured datetime in string format and converting it to the datetime data type.

By "arbitrarily", I mean "a form that the person who wrote it, though perhaps not you or I or someone on the other side of the planet, would consider to be intuitive and completely obvious." Frankly, I'm not sure there is any such algorithm.